Sulfuryl chloride undergoes first-order decomposition at 320.ºC with a half- life of 8.75 h (k = 2.20 × 10-5 s-¹). SO₂Cl2(g) → SO2(g) + Cl₂(g) If the initial pressure of SO2Cl2 is 793 torr and the decomposition occurs in a 1.25-L container, how many molecules of SO₂Cl2 remain after 12.9 h?

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